return
{
[1] = {id=1,x1=1,x1_2=1,x2=2,a1={1,2,},a2={2,3,},b1={3,4,},b2={4,5,},c1={5,6,7,},c2={6,7,},d1={[1]=2,[3]=4,},d2={[1]=2,[3]=4,},},
}